Granted Patent
Utility
US 5,777,180 · App. 08/773,805
Process for the production of bisphenols
Inventors:
Raymond Lawrence June, Robert Lawrence Blackbourn, Edgar Donald Allan, James Laurel Buechele
Patented Case
View Patent ↗
Granted: Jul 7, 1998
Filed: Dec 18, 1996
Inventors
Raymond Lawrence June
Robert Lawrence Blackbourn
Edgar Donald Allan
James Laurel Buechele
Assignee (at issue)
SHELL OIL COMPANY
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.